Showing structure for (1s,2r,4r,7r,9r,11s)-13-[(acetyloxy)methyl]-4,9-dimethyl-14-oxo-3,8,15-trioxatetracyclo[10.3.0.0²,⁴.0⁷,⁹]pentadec-12-en-11-yl (2e)-2-methylbut-2-enoate